
D1027UK
Prelim. 2/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
DIM Millimetres Tol. Inches Tol.
A 19.05 0.50 0.75 0.020
B 10.77 0.13 0.424 0.005
C 45° 5° 45° 5°
D 9.78 0.13 0.385 0.005
E 5.71 0.13 0.225 0.005
F 27.94 0.13 1.100 0.005
G 1.52R 0.13 0.060R 0.005
H 10.16 0.13 0.400 0.005
I 22.22 MAX 0.875 MAX
J 0.13 0.02 0.005 0.001
K 2.72 0.13 0.107 0.005
M 1.70 0.13 0.067 0.005
N 5.08 0.50 0.200 0.020
O 34.03 0.13 1.340 0.005
P 1.57R 0.08 0.062R 0.003
P
D
Power Dissipation
BV
DSS
Drain – Source Breakdown Voltage
BV
GSS
Gate – Source Breakdown Voltage
I
D(sat)
Drain Current
T
stg
Storage Temperature
T
j
Maximum Operating Junction Temperature
438W
70V
±20V
30A
–65 to 150°C
200°C
MECHANICAL DATA
M
KJ
I
ON
A
C
(2 pls)
D
F
E
(4 pls)
B
G
(ty p)
P
(2 pls)
1
5
4
32
H
GOLD METALLISED
MULTI-PURPOSE SILICON
DMOS RF FET
150W – 28V – 175MHz
PUSH–PULL
FEATURES
• SIMPLIFIED AMPLIFIER DESIGN
• SUITABLE FOR BROAD BAND APPLICATIONS
•LOW C
rss
• SIMPLE BIAS CIRCUITS
• LOW NOISE
• HIGH GAIN – 13 dB MINIMUM
DR
PIN 1 SOURCE (COMMON) PIN 2 DRAIN 1
PIN 3 DRAIN 2 PIN 4 GATE 2
PIN 5 GATE 1
ABSOLUTE MAXIMUM RATINGS (T
case
= 25°C unless otherwise stated)
APPLICATIONS
• VHF/UHF COMMUNICATIONS
from 1 MHz to 200 MHz
METAL GATE RF SILICON FET
TetraFET

D1027UK
Prelim. 2/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
Parameter Test Conditions Min. Typ. Max. Unit
70
6
1
17
4.8
0.1
13
50
20:1
360
180
15
VGS= 0 ID= 100mA
VDS= 28V VGS= 0
VGS= 20V VDS= 0
ID= 10mA VDS= V
GS
VDS= 10V ID= 6A
ID= 10mA VDS= V
GS
PO= 150W
VDS= 28V IDQ= 2.4A
f = 175MHz
VDS= 28V VGS= –5V f = 1MHz
VDS= 28V VGS= 0 f = 1MHz
VDS= 28V VGS= 0 f = 1MHz
V
mA
m
A
V
mhos
V
dB
%
—
pF
pF
pF
ELECTRICAL CHARACTERISTICS (T
case
= 25°C unless otherwise stated)
Drain–Source Breakdown
Voltage
Zero Gate Voltage
Drain Current
Gate Leakage Current
Gate Threshold Voltage*
Forward Transconductance*
Gate Threshold Voltage
Matching Between Sides
Common Source Power Gain
Drain Efficiency
Load Mismatch Tolerance
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
HAZARDOUS MATERIAL WARNING
The ceramic portion of the device between leads and metal flange is beryllium oxide. Beryllium oxide dust is highly
toxic and care must be taken during handling and mounting to avoid damage to this area.
THESE DEVICES MUST NEVER BE THROWN AWAY WITH GENERAL INDUSTRIAL OR DOMESTIC WASTE.
R
THj–case
Thermal Resistance Junction – Case Max. 0.4°C / W
THERMAL DATA
* Pulse Test: Pulse Duration = 300 ms , Duty Cycle £2%
TOTAL DEVICE
PER SIDE
PER SIDE
BV
DSS
I
DSS
I
GSS
V
GS(th)
g
fs
V
GS(th)match
G
PS
h
VSWR
C
iss
C
oss
C
rss

D1027UK
Prelim. 2/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
Figure 1 – Power Output and Efficiency
vs. Power Input.
Figure 2 – Power Output & Gain
vs. Power Input.
Figure 3 – IMD vs. Output Power.
Figure 4 – IMD & Gain vs. I
dq
f = 175MHz
Idq= 2A
Vds= 28V
f = 175MHz
Idq= 2A
Vds= 28V
f1= 175.0 MHz
f2= 175.1 MHz
VDS= 28V
f1= 175.0MHz
f2= 175.1MHz
P
out
= 130W PEP
Vds= 28V
2nd harmonic = -28dBc
3rd harmonic = -40dBc
output at 350W
400
350
300
250
P
out
200
W
150
100
50
0
0 2 4 6 8 10 12 14 16 18 20
P
W
in
Pout
Drain Efficiency
100
90
80
70
Drain Efficiency
60
%
50
40
30
20
-20
-30
IMD
-40
dBc
-50
400
350
300
250
P
out
200
W
150
100
50
0
0 2 4 6 8 10 12 14 16 18 20
Pout
Gain
P
W
in
-20
-30
IMD
dBc
-40
20
18
16
14
12
12
18.5
18.5
17.5
17.5
16.5
16.5
Gain
dB
Gain
dB
-60
20 40 60 80 100 120 140 160 180
IMD3 at Idq=1.5A
IMD3 at Idq=2.5A
Pout W PEP
-50
0 0.5 1 1.5 2 2.5
IMD3
IMD5
Gain
I
A
dq
15.5
15.5

D1027UK
Prelim. 2/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
fZ
L
MHz R jX
175 4 -0.5
200 4.5 -4
225 3.5 -5
160
170
180
-170
150
0
-160
225
-150
140
175
130
-140
100
110
120
0.2
0.5
90
80
1
2
ZLopt
Impedance measured Drain - Drain
-130
-120
-110
-100
-80
-90
70
60
50
40
30
20
10
5
10
-40
-50
-60
-70
0
-10
-20
-30
Matching
Network
Z
Lopt

D1027UK
Prelim. 2/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
fZs
MHz R jX
175 1.6 -1.5
200 1.6 -1.2
225 2.3 -2
Matching
Network
ZS
180
opt
160
170
-170
150
0
175
-160
225
200
-150
140
130
-140
120
0.2
ZSopt
-130
110
100
0.5
90
80
70
1
2
Impedance measured Gate - Gate
-120
-110
-100
-90
-70
-80
60
50
40
30
20
10
5
10
-40
-50
-60
0
-10
-20
-30

D1027UK
Prelim. 2/00
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
D1027UK 175MHz TEST FIXTURE
T1,2,3 7cm Storm Products EXE18 19/30 S1TW coaxial cable on Siemens
A1 x 1 2-hole core.
T4,5 14cm Storm Products EXE18 19/30 S1TW coaxial cable.
T6 11cm Storm Products EXE18 19/30 S1TW coaxial cable
L1 6 turns 1.2mm dia wire, 5mm internal diameter
L2 1.5 turns 0.9mm dia wire on Siemens A1 x 1 2 hole core
L2
Gate-Bias
100n 1
T2
1u
T1
2-18 pF
1u
T3
10k
1n
100k
L1
D 1027UK
47pF
D 1027UK
12
90pF
100n
1n
T4
T5
1000u
680pF
2-18 pF
680pF
28V
820K
T6